Under the Han dynasty in ancient China, the salt and iron industries were heavily regulated by the government. The production and distribution of salt and iron were considered to be state monopolies, and the government imposed strict control over these industries. The government would grant production rights to individuals or families, but they would be heavily taxed and closely monitored. This system allowed the government to control the prices and ensure the steady supply of salt and iron, which were crucial for the economy and military of the empire.
